Calculadora de Tejas para TechoFórmula

## How to Calculate Roof Shingles

### Formula

**Squares = Roof Area / 100**

**Bundles = Squares × 3**

A "square" of roofing is 100 square feet. Most asphalt shingles come 3 bundles per square. For ridge caps, one bundle covers approximately 35 linear feet of ridge or hip. Always add 10-15% for waste and starter strips.

Ejemplo Resuelto

A roof with 2,000 sq ft of area, 10% waste, and 40 ft of ridge line.

  1. Adjusted area = 2,000 × 1.10 = 2,200 sq ft
  2. Squares = 2,200 / 100 = 22 squares
  3. Bundles = 22 × 3 = 66 bundles
  4. Ridge cap bundles = 40 / 35 = 1.14 → 2 bundles
  5. Underlayment rolls = 2,200 / 400 = 5.5 → 6 rolls